A GPRS replaceable module communication device includes a motherboard and a daughter board. The motherboard includes necessary components for enabling GPRS module operation and selecting module interface and setting, while the daughter board is a modularized add-on card whose function is determined by a replaceable module. The same GPRS motherboard can be used to accommodate different daughter boards for different functions, and the GPRS motherboard determines either to read the control data on the motherboard, or the control data on the daughter board by the insertion or removal of the daughter board.